Improvement in lifting-jack



@uiten gisten @anni @frn WILLIAM MCMILLEN, OF MILAN, ASSIGNOR TO HIMSELF'AND Z. KING, OF CLEVELAND, OHIO.

Leners Patent No. 70,591, dated Novembe'r 5, 1867.

IMPROVEMENT 1N LIPTmG-JAGK.

' dite dgehule referreh -tn in these etttrs atent aub making putt uf ttesame.

TO .ALL WHOM IT MAY CONCERN: Y l

Be it known that I, WILLIAM McMILLnN, of Milan, in the county of Erie,and State of- Ohio, have invented certain new and useful Improvements inLifting-Jacks; and I do hereby declare that the following' is a full andcomplete description of the s arne,rei`erence being had to theaccompanying drawings, making a. part of this specication, in which-Figures 1 and 2 are side viewsof the jack in different positions.

Figure 3 is. a. top view.

Like letters of reference refer to like parts in the views.

In the drawing, A A represent the legs or standards of the jack, one ofwhich, A, is longer than the other, and is also provided with a.shoulder, b. The upper ends of these standards are connected together bymeans of the link B, which is secured to each leg by the screw-bolts aa. C is a lever, whih is secured to the opposite side of the legs, butby means of the same bolts a a; the bolt a connecting the lever to theleg A,a.nd the bolt a to the leg A', as shown in iig. 3. i

When the jack is to be used, it is pla-ced in the position shown in tig.1, the load resting en either vone of the pins D in the leg A, as may bedesired to raise the load more or less; then, by pressing on the lever,and pushing it down, the upper end 4of the leg A will be lowered and theleg A raised, thus lifting the load, and the lever, when pushed down inthis way, shown in fig. 2, serves as a lock to hold the jack inposition. When the jack is in this position, shown in tig. 2, the end ofthe leg A comes against the leg A, as indicated by the dotterllinesc,fig. 2, and prevents it from being pushed or moved out of pince, as theweight of the load on the ieg A has a. tendency to press and hold themtogether., When the jack is not in use it can be'folded together, asindicated by the dotted lines E, iig. 1, thus taking up very littleroom, and is easily handled, being also cheap and durable. i l v What Iclaim as my improvement, and desire to secure by Letters Patent, is-

The arrangement ofthe legs A A, in combination with the lever C and linkB, whenl pivoted or jointed in the manner substantially as described.WILLIAM McMILLEN.

'Witnessesz S. P. BECKWITH, R. M. KLINE.

